Is it a red flag if a guy avoids talking about a particular ex?

It’s usually a red flag when a guy constantly talks about his ex but what about if it’s the other way around? When you’re dating someone it’s not uncommon for the topic of exes to pop up, I just think it’s a bit shady when a guy avoids talking about his most recent ex yet he’s completely fine talking about the other ones.

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Okay turns out he was still secretly talking to that one ex that he refused to talk about 👍🏻 It all makes sense now
Is it a red flag if a guy avoids talking about a particular ex?
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